In every family session, I like to pull mom and dad aside for a few couple portraits, but there are so many other reasons to celebrate just the two of you.  Couple sessions are for the pre-baby, post-baby, never-having-a-baby, we're-not-ready-for-marriage, we've-been-married-forever, and the we're-just-so-in-love people.  There are so many reasons to get close and preserve this time in your life.  Consider it a date, and I'm just tagging along.